Owing R5000 deposit

Good Day <br> <br> Close to 3 weeks ago we went to Sandown Motors to purchase an A45 Amg for my mum , we were assisted by Farren she advised she had 1 black car available as that was the color my mum liked. The car was not at the dealership at the time but when it did arrive my brother went to view but it was an old spec we wanted the new. We paid a R5000 holding deposit thinking we would buy the car , but Farren kept leading me on with the price to which I still haven't received, we got upset at the time waiting game and purchased a Bmw instead. We asked for our deposit back to which I have gone in circles filling in different paper work to which I got no feedback, this matter was escalated to the Dealer principle to which he promised me I would receive the funds the next morning , it's been 4 days to which I received no feedback and if I call the dealership he is not available or busy in meetings , I left numerous messages which falls on deaf ears , even went as far as emailing him nothing!!! Just pathetic service from the Dealer principle so cannot expect much from the rest of his team , I advise anyone buying a new Mercedes to avoid this dealership pathetic service